JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
  <li>
    <div class='abs'>
      <table class='cart_table'>
         <tr>
             <td>Текст Текст Текст</td>
             <td>Текст Текст Текст</td>
             <td>Текст Текст Текст</td>
             <td>Текст Текст Текст</td>
             <td>Текст Текст Текст</td>
             <td>Текст Текст Текст</td>
             <td>Текст Текст Текст</td>
         </tr>
      </table>
    </div>
  </li>
</ul>

CSS

ul {
   float:right;
   background-color: #000;
   height: 40px;
   width: 100px;
}

li {
  position: relative;
  
}

.abs {
  display: block;
  position: absolute;
    top: 50px;
    right: 0;
    max-height: 560px;
    box-sizing: border-box;
    padding: 10px;
    float: left;
    background-color: rgba(0,0,0,0.8);
    box-shadow: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
}

.cart_table {
    max-height: 388px;
}

.cart_table tr {
    display: block;
    box-sizing: border-box;
    height: 30px;
    min-width: 410px;
    max-width: 840px;
}

.cart_table tr:hover {
    background-color: #000000;
}

.cart_table td {
    display: block;
    box-sizing: border-box;
    height: 30px;
    padding: 0 10px 0 0;
    float: left;
    color: #ffffff;
}